{
  "@context": "https://www.w3.org/ns/activitystreams",
  "summary": "Sally liked a note",
  "type": "Like",
  "actor": {
    "type": "Person",
    "name": "Sally"
  },
  "object": {
    "@context":"activitystreams",
    "type":"Note",
    "actor": "https://bob.example/",
    "to": "https://www.w3.org/ns/activitystreams#Public"
    "content": "Something I would say"
    "published": "2015-02-10T15:04:55Z",
    "signature": {
     "type":"SimpleActivityPub2017"
     "fields":["to","content","published","actor"],
     "creator":"http://bob.example/keys/1"
     "signatureValue":"abdeASDgsasSDHGf=="
   }
}